20550280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{643}}^1$

素因数の和:718

約数の個数: 64

約数和(自身を含む): 50077440

約数和(自身を除く): 29527160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 47, 68, 85, 94, 136, 170, 188, 235, 340, 376, 470, 643, 680, 799, 940, 1286, 1598, 1880, 2572, 3196, 3215, 3995, 5144, 6392, 6430, 7990, 10931, 12860, 15980, 21862, 25720, 30221, 31960, 43724, 54655, 60442, 87448, 109310, 120884, 151105, 218620, 241768, 302210, 437240, 513757, 604420, 1027514, 1208840, 2055028, 2568785, 4110056, 5137570, 10275140, 20550280]

約数ペア:

[(1, 20550280), (2, 10275140), (4, 5137570), (5, 4110056), (8, 2568785), (10, 2055028), (17, 1208840), (20, 1027514), (34, 604420), (40, 513757), (47, 437240), (68, 302210), (85, 241768), (94, 218620), (136, 151105), (170, 120884), (188, 109310), (235, 87448), (340, 60442), (376, 54655), (470, 43724), (643, 31960), (680, 30221), (799, 25720), (940, 21862), (1286, 15980), (1598, 12860), (1880, 10931), (2572, 7990), (3196, 6430), (3215, 6392), (3995, 5144)]